Good quality of communication but too sensitive call button

But the HUGE handicap for me is much too sensitive call button.

The headset is often in my pants pocket and call too often - and unwittingly - my correspondents ... who do not ask much. Two random pressures by the simple movement of the body = Direct callback of the last dialed number. It happened to me to call someone 5 times unwittingly at 5am ...

In the model M155 that I had before, the call button was pressed and slightly cutout to minimize this risk. It was well thought ... why did you change?